PE would be Polyethylene, check ISO for TC.

100-450 or so

In ISO9001:2008 see the "Introduction" clause 0.2. The introduction is an informative part of the standard and not normative like clauses 1 through 8.

ISO TC 176 supports the process approach. They have provided a guidance document on the subject: ISO/TC 176/SC 2/N544R3. This may be downloaded, presently free of charge, from:

www.iso.org/tc176/sc2

The ISO (International Organization for Standardization) sets standards for building fire safety through ISO 7240 and ISO 14520. ISO 7240 outlines requirements for fire detection and alarm systems, covering design, installation, and maintenance. ISO 14520 pertains to gaseous fire-extinguishing systems, specifying criteria for their design and installation. Compliance with these standards ensures that buildings have effective fire safety measures in place.

The factors of 223 are: 1, 223 (223 is a prime number).